A family of Microsoft word processing software products for creating web, email, and print documents.
On any given machine, I have Windows Update configured to notify me when updates are available. I choose those I need (because I have parts of several versions of Office installed on my XP machines, I get offered a lot of updates that aren't applicable, such as Junk Mail Filter updates for several version of Outlook) and download and install them. I've never had any problem.